--- jsr166/src/main/intro.html 2003/08/06 17:40:20 1.11 +++ jsr166/src/main/intro.html 2003/09/27 12:21:56 1.14 @@ -1,39 +1,26 @@ - JSR 166 Community Review Draft Introduction. + JSR 166 Introduction. -

JSR 166 Community Review Draft Introduction.

+

JSR 166 Introduction.

by Doug Lea

-To check for updates to this draft, access a preliminary prototype -release of main functionality, or join a mailing list discussing this -JSR, go to: -http://altair.cs.oswego.edu/mailman/listinfo/concurrency-interest -. -

- - Disclaimer. The prototype implementation is experimental -code developed as part of JCP JSR-166 is made available to the -developer community for use as-is. It is not a supported product. Use -it at your own risk. The specification, language and implementation -are subject to change as a result of your feedback. Because these -features have not yet been approved for addition to the Java language, -there is no schedule for their inclusion in a product. - -

Disclaimer. This draft specification was produced -using JDK1.4 tools plus some preprocessing. The resulting javadocs do -not yet correctly render other planned JDK1.5 constructs on which -JSR-166 relies, most notably the use of generic types. We are -releasing this version now (before the availability of JDK1.5-based -tools) because, even though they are misformatted and sometimes lack -proper cross-referencing, they otherwise convey the intended -specifications. +http://altair.cs.oswego.edu/mailman/listinfo/concurrency-interest. + +

Note: The javadocs here includes some existing java.util +Collection interfaces and classes that are not part of the JSR-166 +spec, but are included because JSR-166 methods implement or inherit +from their specifications.

JSR-166 introduces package java.util.concurrent containing utility classes commonly useful in concurrent @@ -50,8 +37,8 @@ pools. This diversity reflects the range of contexts in which developers of concurrent programs have been found to require or desire support not previously available in J2SE, which also keeping the -resulting package small; providing only that minimial support for -which it makes sense to standardize. +resulting package small; providing only functionality that it makes +sense to standardize.

Descriptions and brief motivations for the main components may be found in the associated package documentation. JSR-166 also includes @@ -68,20 +55,28 @@

Threads

-Two minor changes are introduced to the {@link java.lang.Thread} -class: It now allows per-thread installation of handlers for uncaught -exceptions. Ths optionally disassociates handlers from ThreadGroups, -which has proven to be too inflexible. (Note that the combination of -features in JSR-166 make ThreadGroups even less likely to be used in -most programs. Perhaps they will eventually be deprecated.) Secondly, -access checks are no longer required when a Thread interrupts -itself. The interrupt method is the only way to -re-assert a thread's interruption status (and in the case of -self-interruption has no other effect than this). The check here -previously caused unjustifiable and uncontrollable failures when -restricted code invoked library code that must reassert interruption -to correctly propagate status when encountering some -InterruptedExceptions. +Three minor changes are introduced to the {@link java.lang.Thread} +class: +

Timing

@@ -98,6 +93,5 @@
-
Doug Lea